Sharp R-4H54 - Page 18

PIN NO. : 15 1 SIGNAL j INTI
I
I/O
i IN
,
Signal to svnchronize LSI with commercial power source frequency.
This is the basic timing for all real time processing of LSI.
J7-r-IGND
c 20mK. -i---- LI-5V)
PIN NO. i 16
1 SIGNAL j E3
I
I/O
i OUT
Magnetron Hiah-voltage circuit drivincl signal.
To turn on and off the cook relay(RY2). In HIGH operation, the signals holds “L” level during microwave cooking
and “H” level while not cooking. In other cooking modes (M.HIGH,MED,M.LOW,LOW) the signal turns to “H”
level and “L” level in repetition according to the power level.
VARI-MODE
HIGH
(100% power)
M.HIGH
(approx 70% power)
MED
(approx.5096 power)
M.LOW
(approx.30% power)
LOW
(approx.lO% power)
ON TIME OFF TIME
32sec.
Osec
24sec.
8sec.
18sec 14sec.
12sec. 20sec.
Gsec. 26sec.
PIN NO. I 17-21
1 SIGNAL / CO-C4
I
I/O
/ OUT
Used for initial balancing of the bridge circuit(absolute humidity sensor)
PIN NO.
22-23 1 SIGNAL
/ C5-C6
Used for initial balancing of the bridge circuit (WEIGHT SENSOR).
I
I/O
1 OUT
PIN NO.
24 1 SIGNAL ; C7
I
I/O
j OUT
Oven lamp driving signal (Square waveform: 50Hz).
To turn on and off shut-off relay( RYI ). The square waveform voltage is delivered to the relay( RYI ) driving circuit
and relay (RY2) control circuit.
PIN NO.
; 25 1 SIGNAL j HO
I
I/O
i IN
Signal coming from touch key.
When any one of G-l 2 line keys on key matrix is touched, a corresponding signal from B2,B3,85,B6,B7,GO and
Gl will be input onto HO. When no key is touched, the signal is held at “L” level.
PIN NO.
/ 26
1 SIGNAL / HI
I
I/O 1 IN
Sinnal similar to HO.
When any one of G-l 1 line keys on key matrix is touched, a corresponding signal will be input into HI.
PIN NO. j 27
Signal similar to HO.
1 SIGNAL / H2
I
I/O
i IN
When any one of G-IO line keys on key matrix is touched, a corresponding signal will be input into H2.
16